Franz Holtmann wrote a detailed review of a J17 X Standard in the 4/97-issue of German magazine »Akustik-Gitarre« .
Franz Holtmann concludes
»The Sonntag J-17 X archtop Jazz guitar is an outstanding instrument. It combines good tone-woods and a tasty design with craftmanship to a beauty of tone that doesn't need to be afraid of the competition from overseas.«